Development of alternatives for accelerating structure in the range of intermediate proton energy
A scope of the linear accelerating structures for acceleration proton high rower beams in energy range 5… 100 MeV is presented. Main task lies in a possibility to use superconductive equipment. The results are given for +original desgn of accelerating structures of alternating segments being excit...
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| Опубліковано в: : | Вопросы атомной науки и техники |
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| Дата: | 2004 |
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2004
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Development of alternatives for accelerating structure in the range of intermediate proton energy / V.A. Bomko, A.M. Egorov, A.P. Kobets, E.D. Marinina, B.I .Rudiak, S.S. Tishkin, S.A. Vdovin, B.V. Zaitsev // Вопросы атомной науки и техники. — 2004. — № 2. — С. 42-46. — Бібліогр.: 32 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1859669863234011136 |
|---|---|
| author | Bomko, V.A. Egorov, A.M. Kobets, A.P. Marinina, E.D. Rudiak, B.I. Tishkin, S.S. Vdovin, S.A. Zaitsev, B.V. |
| author_facet | Bomko, V.A. Egorov, A.M. Kobets, A.P. Marinina, E.D. Rudiak, B.I. Tishkin, S.S. Vdovin, S.A. Zaitsev, B.V. |
| citation_txt | Development of alternatives for accelerating structure in the range of intermediate proton energy / V.A. Bomko, A.M. Egorov, A.P. Kobets, E.D. Marinina, B.I .Rudiak, S.S. Tishkin, S.A. Vdovin, B.V. Zaitsev // Вопросы атомной науки и техники. — 2004. — № 2. — С. 42-46. — Бібліогр.: 32 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | A scope of the linear accelerating structures for acceleration proton high rower beams in energy range 5…
100 MeV is presented. Main task lies in a possibility to use superconductive equipment. The results are given for
+original desgn of accelerating structures of alternating segments being excited on E11-wave on π/2-mode. A possibility is discussed about the use of focusing blocks with the RF–quadrupoles which uniformly fit into the chain of
accelerating cells.
Приводиться огляд розробок конструкцій структур лінійних прискорювачів протонів з високою
потужністю пучка в діапазоні енергій 5...100 МеВ. Основна вимога полягає в можливості використання
надпровідної техніки. Описані результати оригінальних розробок прискорюючої структури типу зустрічних
сегментів, що збуджується на Е11-хвилі, а також можливість застосування фокусуючих блоків з ВЧ-квадруполями, які однорідно вписуюються в цепочку прискорюючих комірок.
Приводится обзор разработок конструкций структур линейных ускорителей протонов с большой мощностью пучка в диапазоне энергий 5...100 МэВ. Главная задача заключается в возможности использования сверхпроводящей техники. Описаны результаты оригинальных разработок ускоряющей структуры типа встречных
сегментов, возбуждаемой на Е11-волне, и возможность применения фокусирующих блоков с ВЧ – квадруполями, которые однородно вписываются в цепочку ускоряющих ячеек.
|
| first_indexed | 2025-11-30T13:28:33Z |
| format | Article |
| fulltext |
ACCELERATOR COMPONENTS
DEVELOPMENT OF ALTERNATIVES FOR ACCELERATING STRUC-
TURE IN THE RANGE OF INTERMEDIATE PROTON ENERGY
V.A.Bomko, A.M.Egorov, A.P.Kobets, E.D.Marinina, B.I.Rudiak, S.S.Tishkin, S.A.Vdovin,
B.V.Zaitsev
National Science Center “Kharkov Institute of Physics and Technology”, 61108, Kharkov,
Ukraine,
E-mail: bomko@kipt.kharkov.ua
A scope of the linear accelerating structures for acceleration proton high rower beams in energy range 5…
100 MeV is presented. Main task lies in a possibility to use superconductive equipment. The results are given for
+original desgn of accelerating structures of alternating segments being excited on E11-wave on π/2-mode. A possi-
bility is discussed about the use of focusing blocks with the RF–quadrupoles which uniformly fit into the chain of
accelerating cells.
PACS: 29.17.+w
1. INTRODUCTION
Development and construction of powerful proton
linear accelerators is currently the most topical line of
accelerating industry. A number of important research
and design and tasks is set up which can be solve with
powerful proton beams accelerated to 1...2 GeV. The
problem of safe and effective nuclear energetics is put in
the forefront. Accelerator driven nuclear energetic based
on the accelerator-reactor complex gives a possibility to
operate in the subcritical and, therefore, to ensure safe
nuclear energetic. Such a reactor on fast neutrons allows
also incinerate the most harmful radiotoxic long lived
decay products in nuclear waste such as plutonium and
other transuranic elements; with this extra energy will
be produced. The rigid neutron spectrum allows using in
the fuel cycle thorium which is abundant in the earth's
crust or depleted 238U; this will solve the problem of fuel
once and for all.
The proton accelerator used in accelerator driven nu-
clear energetic complex to compensate the neutron defi-
ciency in the subcritical reactor should produce a proton
beam with the power to 30 MW and energy of 1...1.5
GeV and current of 25...30 mA in the continuous mode.
The task of the development of such an accelerator was
set up in the middle 90ties in the works of CERN team
[1] that immediately attracted researchers in different
countries. It was supposed that presentation samples the
EA complexes would have been constructed by 2015.
However, according to known sources no project of this
type has been funded yet; but the question on creation of
Pan-European powerful linacs is still open. Presently,
several projects of conservative approach and more dis-
tant terms of construction and putting into operation are
discussed. These accelerators are expected to be mul-
ti-purpose. Practically, proton beams of different ener-
gies and power are directed to experimental installations
for solving problems in physics of high energies and nu-
clear physics, biology, medicine, material engineering,
transmutation of nuclear waste. It is assumed to create
neutron fluxes in the spallation-reaction of higher inten-
sity and more flexible pulsed operational mode than re-
search nuclear reactors. Problems of creation of intense
fluxes of secondary particles such as mesons and neutri-
nos directed on targets located at distances of hundreds
and thousands kilometers with intensity of 1020 annually
will be being solved which are the most important from
scientific viewpoint.
2. PROJECTS OF POWERFUL LINACS
These are the projects under intensive science and
technological development such as European spallation
neutron generator (ESS) on the energy of 1.3 GeV with
the duty factor of 15% and average beam power of
5 MW [2]. The SPL project (superconducting linac) on
the energy of 2.2 GeV with the duty factor of 14% and
beam power of 4 MW [3]; the EURISOL project –
1(2) GeV, 5 MW [4]; the SNS project – 1 GeV,
1.5 MW [5]; JAERY-KEK – 600 MeV [6]. The two last
projects are already funded, and the time of putting
them into operation is fixed, 2006 and 2007, respective-
ly.
The works on projects of powerful proton linear ac-
celerators which imply the creation of presentational
samples for accelerator driven nuclear energetics are be-
ing continued. Such are the TRASCO project [7], Italy,
COMAK [8], Korea, AAA, Los Alamos, [9], ITEP,
Russia, [10]. These projects are rated for continuous op-
erational mode with the average beam power of tens of
MW. Their implementation meets with a series of un-
solved technical problems; though, in principle, the
modern technological level of accelerating technique
will allow to overcome them.
3. THE CONCEPTUAL SCHEME
General architecture of the mentioned above linacs
is approximately the same. There is the common opin-
ion that an accelerator should be divided in the follow-
ing sections:
1. A proton or H- source with intensity to 100 mA of
the ICR type. Currently, the highest parameters of pro-
ton beams are achieved. With such a current, the emit-
tance is about 0.2 π mm mrad. At the frequency of
2.4 GHz and high voltage of 100 kV the RF discharge is
stable. Very high reliability is achieved [11].
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PROBLEMS OF ATOMIC SIENCE AND TECHNOLOGY. 2004. № 2.
Series: Nuclear Physics Investigations (43), p.42-46. 42
2. Beam transportation systems (LEBT) providing
ion and optical diagnostics and transportation and beam
matching at the input of the RFQ structure.
3. RFQ accelerating structure. In many laboratories
in the world RFQ structures are so highly developed that
there is doubtless that it is possible to achieve the re-
quired beam parameters with energy of several MeV
and intensity of tens of mA.
4. The range of intermediate energies of a proton
beam from 5 to 100 MeV. For different projects upper
and lower figures are differs essentially. This range will
be discussed later. It is the most vulnerable area as in
electrodynamical characteristics and in the costs and
complexity of development.
5. The range of high energies is the main part of an
accelerator. During last years, there was disagreement
on the choice of accelerating structure and on the choice
between the conventional and superconductive alterna-
tives. However, by the present time as EPAC-2002 pro-
ceedings show the general opinion is elaborated: the
high-energy section of the accelerator should be super-
conductive.
4. SUPERCONDUCTIVE ACCELERATING
STRUCTURES
Application of superconductive cavities offers great
advantages. Extremely low losses of RF-power in sur-
faces allow considerable energy saving, especially in the
continuous operational mode of an accelerator. Practi-
cally, the RF-power is only used for beam acceleration.
The corresponding decrease in the number of generators
would considerably reduce the cost of the accelerator.
From the technologic point of view, application of su-
perconductive cavities allows to increase apertures that
will give a chance to reduce essentially the beam losses
due to halos and, therefore, to reduce activation. Here,
we have to do with a possibility to achieve zero losses
even in a high current beam. Besides that, the length of
high-energy part is less almost three times in compari-
son with a ‘warm’ alternative due to high surface and
middle gradients of the electric field. Again, the short
superconductive structures give a chance to realize the
flexible operational mode providing the necessary relia-
bility and availability. The drawback is that the use of
cryogenics, but this technique is already successfully
put into action in a few large installations.
By the present time, the superconductive structures
are sufficiently elaborated and studied and are already
used in the large accelerating installations with β=1.
Those are TRISTAN [12], HERA [13], CEBAF [14],
LEP-2 [15], and others. Due to superconductivity the
average operational gradient of the accelerating field of
about 4...6 MV/m is achieved, and in individual cases
(CEBAF) - 7 MV/m, and even 14 MV/m.
For each case of the superconductive cavities several
conditions should be met; failing to meet them would
complicate the operation:
To achieve a high quality factor (Q~1011) it is neces-
sary to maintain the surface resistance not higher than
0.2 nOhm [16].
1. On the metallic surfaces secondary emission may
arise with high electric fields. This phenomenon may be
caused with nonuniformity on working surfaces of all
kinds; therefore their especially careful finishing under
conditions of extreme purity is necessary.
2. High-gradient quench is caused with thermomag-
netic breakdown of superconductivity. The theoretical
limit in magnteic field for Nb is rather high (up to
190 mT at 2K). However, the experimental values are
much lower (50 mT) owing to surface defects. Electric
polishing allows to achieve 130 and even 170 mT at in-
dividual cells (KEK, Desy, CERN, Sacle) [17]. Under
laboratory conditions accelerating fields up to 40 MV/m
are achieved. However, to perform this in full scale is
very difficult.
3. The extra losses in the surfaces are caused with
oxygen diffusion into niobium. Experiments on heating
at temperatures of 80–150oC demonstrated the possibili-
ty to avoid the drop in Q.
4. The multipactor resonance discharge in a cavity.
The elliptic shape of the cavities decreases a probability
of multipaction. However, there is a number of other
reasons for its initiation.
5. Lorentz forcedetuning and microphone effect.
Cavities working in the pulsed mode undergo mechanic-
al influence of the electromagnetic field causing a shift
in frequency and mechanical vibrations. With very high
Q this influence is essential. To avoid these effects
high-speed auto-tuning system is used.
Superconductive cavities reached the high level and
are widely used in accelerating technology. Its applica-
tion for proton linacs stimulates further modernization.
In this respect, a considerable contribution to further de-
velopment of SC technology will be the SNS complex
which presently is being built in which SC cavities are
used [18].
5. ACCELERATING STRUCTURES OF THE
INTERMEDIATE ENERGY RANGE
In linear accelerators rated for acceleration of pro-
ton beams with high duty factor, and even in continuous
mode, new problems arise of fundamental and technolo-
gic nature. The Alvaretz accelerating structures having
long cavities stuffed with tens of drift tubes which con-
tain magnetic quadrupoles that are most often used for
this energy range are unfit got new conditions. The
enormous amount of RF-power absorbed in cavity walls
and drift tubes less pronounced in the structures with a
small duty factor may exceed the permissible level of
10...15 kW/m. The value of shunt impedance is determ-
ined largely by drift tube diameters [19]. The use of drift
tubes with magnetic quadrupoles in structures with high
operating frequency results in the sharp drop in the
shunt impedance. Accelerating structures with tubes
without focusing devices allow to achieve the effective
shunt impedance about 55 MOhm/m. With the use of
quadrupoles with constant magnets Rs drops to
48 MOhm/m, which is still acceptable, therefore a few
projects of proton linear accelerators with high duty
factors are rated for this alternative in the range
5...50 MeV. However, the drawback of such a structure
lies in the fact that the constant magnets are impossible
to control and in for their replacement large efforts
would be necessary.
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PROBLEMS OF ATOMIC SIENCE AND TECHNOLOGY. 2004. № 2.
Series: Nuclear Physics Investigations (43), p.42-46.43
A structure with focusing devices brought out into
the gaps between short section in this energy range
should not exceed 5...6 βλ for radial beam stability.
Hence, in this case there should be many short cavities,
each of them being supplied from an individual generat-
or. The acceleration rate is also low due to the known
periodical structure of L=βλ. This results in a complic-
ated system of auto-regulation and the total effect of er-
rors leads to the rise in the radial emittance. In this con-
nection, the search is under way for an effective struc-
ture possessing high Rs and high accelerating rate and,
at the same time, which would allow to combine several
cavities in one module with common power supply.
Development of accelerating structures for the inter-
mediate energy range until recently was focused on a
side coupling cavity linac, SCCL. This structure is real-
ised at Los Alamos meson factory [20] for π/2-wave. In
the side coupling cavities nodes of variations of electric
field are localised, therefore performing and power
transportation from one cavity to another this cells prac-
tically do not cause its losses. Accelerating cells are ex-
cited with RF-power similarly to π-structure providing
high accelerating rate. High resolution of modes typical
for π/2-wave provides stable electrodynamic character-
istics. This structure is used widely in the energy range
above 100 MeV. However, in the lower energy range it
is ineffective owing to the small cell lengths.
In this connection, an alternative CCDTL (Coupled
Cell Drift Tube Linac) [21] was developed in which into
the accelerating cell a drift tube is inserted that elong-
ates it by βλ. Such cavity contains two gaps; its total
length is 3/2 βλ. The accelerating cavities are joined by
side coupling cavities. The beam focusing is achieved
with magnetic quadrupoles brought out outside the cells.
CCDTL structure is acknowledged as the most ef-
fective in the ‘warm’ variant in the energy range of
20...100 MeV. Its use in the superconductive alternative
is complicated because of large transverse dimensions
due to the side coupling cavities. Besides that, the small
cell length in the range of small β assumes the close ar-
rangement of magnetic quadrupoles.
In the last years, new modifications of accelerating
structures designed for SC were proposed for intermedi-
ate energy range. Beside CCDTL the most developed
structures are ‘re-entrant’ cavity structures. Another
modification is the ‘spoke-cavity’ structure based on
two-gap half-wave cavity.
The ‘re-entrant’ cavity structure forms the basis for
intermediate part of the TRASCO project (Italy) [22,
23]. It is being developed as a superconductive variant
at the frequency of 350 MHz. It is assumed also to loc-
ate SC quadrupoles in the cryostat. A low coupling
coefficient between cells assumes the small length of
sections and very branched system of RF-power supply.
The structure of ‘spoke cavity’ type is under devel-
opment at IPM, Orsey, France for European of EUR-
ISOL, XADS linac projects. Drift tubes are placed at the
maximum of potential difference of half-wave rod. In
the contrast to CCDTL, in neighbouring gaps the elec-
tric field strength corresponds to π-wave. The structure
is designed to be operated as the SC variant. It possesses
low Rs when it is ‘warm’. Each of single-cell cavity is
supplied with power from an individual generator. Fo-
cusing is carried out with SC quadrupoles inside the
cryostat.
The described cavities promise SC application in
the intermediate proton energy range. However, they
will demand complicated RF-systems. Besides that, the
location of SC quadrupoles inside cryostat requires new
constructional innovations, their tuning and replacement
if malfunctions occur. Presently, development and test-
ing of these systems are under way.
In connection with the above, it is pertinent to cite
J. D. Schneider [26] “Distribution of superconductive
structures on the low energy range will probably be con-
tinued as superconductivity in RF-systems promises
considerable operating advantages, especially for accel-
erating continuous beams. For the range of low β we
should demonstrate cavity configurations which differ
from traditional elliptic niobium structures”.
6. MULTI-CELL ACCELERATING
STRUCTURES
The drawbacks of the accelerating structures of Al-
varetz type specified above with respect to acceleration
of powerful proton beams, especially in the continuous
mode made researchers develop accelerating structures
in the form of separated cells coupled in RF-power or
completely supplied from individual generators. Such a
solution that was complicated beforehand was made
with the purpose to increase the acceleration rate with
the transition on the mode of π or π/2 waves. This re-
quired the separation of accelerating and focusing units.
With that the beam focusing in all cases was carried out
with a magnetic quadrupoles laced between accelerating
cavities with the FODO and sometimes FOFDOD fo-
cusing periods or focusing doublets FDOFD. Such fo-
cusing devices were set rather closely in the range of
low (intermediate) energies; this decrease the accelerat-
ing rate essentially.
We searched a possibility to go back to multi-cell
structure in the variant free from these drawbacks. The
backgrounds for this were two elaborated approaches:
1. The use of RF-quadrupole modification instead of
magnetic system for beam focusing.
2. The use of a new variant of multi-cell accelerating
structure on the π/2 wave.
6.1. BEAM FOCUSING WITH RF-QUADRUPOLE
UNITS
The principle of focusing of a proton beam being ac-
celerated that was proposed earlier with RF-quadrupoles
in the structure of ‘horned’ drift tubes [27,28] and a
variant of RF-quadrupole focusing realized by the team
of V.A. Teplyakov [29] has opened up new opportuni-
ties for accelerating high current beams. The URAL
proton accelerator built on the basis of this principle op-
erates successfully accelerating proton beams to the en-
ergy of 30 MeV and the current of 100 mA [30]. In this
variant based on the accelerating structure on H01-wave
effective focusing is achieved at the cost of essential de-
crease in accelerating rate, therefore, despite consider-
able beam current limit, developers of linacs do not take
this principle into consideration. At the same time, the
44
principle of focusing with RF-quadrupoles possesses
high capabilities.
In the Fig. a layout of RF-quadrupole block (RFQB)
exhibiting an accelerating and focusing doublet which
consists of two two-gap cells of the CCDTL type.
RF-quadrupole block of two-gap cells of the CCDTL
type
The total length of paired cells is 3 βλ. The central
part of the unit is a drift tube that is symmetrical rela-
tively to the dividing wall and with long ‘horns’ forming
two focusing quadrupoles in two planes. The location of
the quadrupoles corresponds to the space in the structure
where the drift tubes are located that screen the particles
being accelerated from the hindering effect of the elec-
tric field. Thus, a section of βλ/2 in each cell that is
equal to 1/3 of the cell length is saved beside the fact
that in each of two planes where the ‘horns’ are placed
there are two accelerating gaps.
A value of focusing gradient in RFQB and its place
in the chain of accelerating cells is determined from ra-
dial dynamics of bunches being accelerated along the
cells. Efficiency of beam focusing with such doublets is
high therefore their number is less than in the structure
of a focusing period with spaced quadrupoles.
The variant of RFQB focusing described above may
be successfully applied for instance to a CCDTL struc-
ture where the cells are separated and the coupling is
performed through side cells. Their application is effi-
cient both in ‘warm’ and in SC variants. CCDTL struc-
ture is being developed for accelerating protons in the
intermediate energy range under few projects. The
length of SC module is limited, from one hand, with a
small coefficient of coupling carried out through side
cells and usually do not exceed 3...5%. From the other,
the imposed limitation on the module length is due to
the length of the focusing period when magnetic
quadrupoles are located outside the cryomodule, there-
fore, in the range of low energies a large number of
short cryomodules are required that makes the structure
more complicated.
6.2. THE ACCELERATING STRUCTURE OF
THE TYPE OF ALTERNATING
ARRANGEMENT OF SEGMENTS ASAS
Another situation is formed when RFQB may be
used for beam accelerating. Their little difference from
the accelerating cells does not impose limitations on the
length of cryomodule; in this case the length will be de-
termined by the power of RF-generator and other con-
structional considerations.
In this connection, we considered a possibility to use
adequate accelerating structures. The most favorable in
this respect was a accelerating structure of alternating
segments (ASAS) type [31,32]. This structure did not
found practical use because at that time creation of pow-
erful proton linear accelerators was not considered.
The ASAS structure is two chains of identical cells
combined in the same cylindrical cavity and being excit-
ed on E11-wave; one of them is accelerating cell, and the
other is the coupling one. Distribution of the electric
field of the E11-wave is two antinodes the centers of
which are at the distance of 0.46 of the radius from the
axis of the cavity. Drift tubes of the accelerating and
coupling cells are located along the antinodes. In the
second art as in other π/2 structures the stored power is
practically absent so there are no power losses. At the
same time, the coupling coefficient is high. As the mod-
el investigations showed the diameter of a cavity loaded
in this way will be about 60 cm at 600 MHz. The cou-
pling coefficient is about 30% that offers unlimited op-
portunities to lengthen the cavity. The structure possess-
es the high shunt impedance therefore it is suitable for
operation in the ‘warm’ variant. From the other hand,
the immediate contact of internal elements of the accel-
erating structure with a cylindrical wall of the cavity al-
lows to perform rather effective heat-removal providing
the operation under SC mode.
7. CONCLUSIONS
Proton linear accelerators are being really construct-
ed. The use of superconductivity allows increasing es-
sentially the efficiency of acceleration due to consider-
able reduction of accelerators length and decreasing in
operational costs. In the energy range from 100 to
1000 MeV SC accelerating structures are elaborated.
For the first time such an SC section is utilized in the
SNS project. In the range of intermediate energies yet
there is no general opinion about selecting the most ef-
fective accelerating structure. The variant of
RF-quadrupole focusing presented in the report allows
to solve a large part of problems. In combination an ac-
celerating structure of alternative arrangement of seg-
ments, there is a possibility to create an effective variant
of a proton accelerator in the intermediate energy range.
More theoretical and experimental investigations of
electrodynamics of cavities and dynamics of beams be-
ing accelerated are necessary.
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РАЗРАБОТКА ЭФФЕКТИВНЫХ МОДИФИКАЦИЙ УСКОРЯЮЩИХ СТРУКТУР В ДИАПАЗОНЕ
ПРОМЕЖУТОЧНЫХ ЭНЕРГИЙ ПРОТОНОВ
В.А.Бомко, С.А.Вдовин, A.M.Eгоров, Б.В.Зайцев, А.Ф.Кобец, Б.К.Рудяк, Е.Д.Маринина, С.С.Тишкин
Приводится обзор разработок конструкций структур линейных ускорителей протонов с большой мощно-
стью пучка в диапазоне энергий 5...100 МэВ. Главная задача заключается в возможности использования сверх-
проводящей техники. Описаны результаты оригинальных разработок ускоряющей структуры типа встречных
сегментов, возбуждаемой на Е11-волне, и возможность применения фокусирующих блоков с ВЧ – квадруполя-
ми, которые однородно вписываются в цепочку ускоряющих ячеек.
РОЗРОБКА ЕФЕКТИВНИХ МОДИФІКАЦІЙ ПРИСКОРЮЮЧИХ СТРУКТУР В ДІАПАЗОНІ
ПРОМІЖНИХ ЕНЕРГІЙ ПРОТОНІВ
В.О.Бомко, С.О.Вдовін, O.M.Егоров, Б.В.Зайцев, А.П.Кобець, Б.І.Рудяк, Е.Д.Мариніна, С.С.Тішкин
Приводиться огляд розробок конструкцій структур лінійних прискорювачів протонів з високою
потужністю пучка в діапазоні енергій 5...100 МеВ. Основна вимога полягає в можливості використання
надпровідної техніки. Описані результати оригінальних розробок прискорюючої структури типу зустрічних
сегментів, що збуджується на Е11-хвилі, а також можливість застосування фокусуючих блоків з ВЧ-
квадруполями, які однорідно вписуюються в цепочку прискорюючих комірок.
46
Приводиться огляд розробок конструкцій структур лінійних прискорювачів протонів з високою потужністю пучка в діапазоні енергій 5...100 МеВ. Основна вимога полягає в можливості використання надпровідної техніки. Описані результати оригінальних розробок прискорюючої структури типу зустрічних сегментів, що збуджується на Е11-хвилі, а також можливість застосування фокусуючих блоків з ВЧ-квадруполями, які однорідно вписуюються в цепочку прискорюючих комірок.
|
| id | nasplib_isofts_kiev_ua-123456789-79325 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-11-30T13:28:33Z |
| publishDate | 2004 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Bomko, V.A. Egorov, A.M. Kobets, A.P. Marinina, E.D. Rudiak, B.I. Tishkin, S.S. Vdovin, S.A. Zaitsev, B.V. 2015-03-31T09:03:05Z 2015-03-31T09:03:05Z 2004 Development of alternatives for accelerating structure in the range of intermediate proton energy / V.A. Bomko, A.M. Egorov, A.P. Kobets, E.D. Marinina, B.I .Rudiak, S.S. Tishkin, S.A. Vdovin, B.V. Zaitsev // Вопросы атомной науки и техники. — 2004. — № 2. — С. 42-46. — Бібліогр.: 32 назв. — англ. 1562-6016 PACS: 29.17.+w https://nasplib.isofts.kiev.ua/handle/123456789/79325 A scope of the linear accelerating structures for acceleration proton high rower beams in energy range 5… 100 MeV is presented. Main task lies in a possibility to use superconductive equipment. The results are given for +original desgn of accelerating structures of alternating segments being excited on E11-wave on π/2-mode. A possibility is discussed about the use of focusing blocks with the RF–quadrupoles which uniformly fit into the chain of accelerating cells. Приводиться огляд розробок конструкцій структур лінійних прискорювачів протонів з високою потужністю пучка в діапазоні енергій 5...100 МеВ. Основна вимога полягає в можливості використання надпровідної техніки. Описані результати оригінальних розробок прискорюючої структури типу зустрічних сегментів, що збуджується на Е11-хвилі, а також можливість застосування фокусуючих блоків з ВЧ-квадруполями, які однорідно вписуюються в цепочку прискорюючих комірок. Приводится обзор разработок конструкций структур линейных ускорителей протонов с большой мощностью пучка в диапазоне энергий 5...100 МэВ. Главная задача заключается в возможности использования сверхпроводящей техники. Описаны результаты оригинальных разработок ускоряющей структуры типа встречных сегментов, возбуждаемой на Е11-волне, и возможность применения фокусирующих блоков с ВЧ – квадруполями, которые однородно вписываются в цепочку ускоряющих ячеек. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Элементы ускорителей Development of alternatives for accelerating structure in the range of intermediate proton energy Розробка ефективних модифікацій прискорюючих структур в діапазоні проміжних енергій протонів Разработка эффективных модификаций ускоряющих структур в диапазоне промежуточных энергий протонов Article published earlier |
| spellingShingle | Development of alternatives for accelerating structure in the range of intermediate proton energy Bomko, V.A. Egorov, A.M. Kobets, A.P. Marinina, E.D. Rudiak, B.I. Tishkin, S.S. Vdovin, S.A. Zaitsev, B.V. Элементы ускорителей |
| title | Development of alternatives for accelerating structure in the range of intermediate proton energy |
| title_alt | Розробка ефективних модифікацій прискорюючих структур в діапазоні проміжних енергій протонів Разработка эффективных модификаций ускоряющих структур в диапазоне промежуточных энергий протонов |
| title_full | Development of alternatives for accelerating structure in the range of intermediate proton energy |
| title_fullStr | Development of alternatives for accelerating structure in the range of intermediate proton energy |
| title_full_unstemmed | Development of alternatives for accelerating structure in the range of intermediate proton energy |
| title_short | Development of alternatives for accelerating structure in the range of intermediate proton energy |
| title_sort | development of alternatives for accelerating structure in the range of intermediate proton energy |
| topic | Элементы ускорителей |
| topic_facet | Элементы ускорителей |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/79325 |
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